Sigmund Stern Grove is a beautiful park in San Francisco with a small lake. In the summer, families often love the Stern Grove Festival, an admission-free performing arts series, in Sigmund Stern Grove, a beautiful outdoor amphitheater located at 19th Avenue and Sloat Boulevard in San Francisco.
We've seen two great concerts here - we lucked out with the weather and the performances. Lots of families with little ones and if the weather is sunny, it can be a positively beatific experience. A bit of a hike from where we live but bring a picnic and spend the day. Did I mention it's FREE? For schedule: http://www.sterngrove.org/index.html